Types of weighing apparatus

The steelyard has a long history and a huge market in our country. The steelyard has bone, wood and metal rods (copper and aluminum); The weight has a stone weight and a metal weight; There are two lifting ropes and three lifting ropes. The evolution of the units of measurement from the Xia and Shang dynasties using zhu and liang, developed to the Zhou Dynasty using zhu, liang, jin, Jun, shi (24 baht is one jin, 16 liangjin is one jin, 30 jin is one jin, 40 are one shi). According to ancient books, in ancient times to the Big Dipper, six stars and Fu Lu Shou three stars a total of 16 stars as a record, in the beam of the scale carved 16 star flowers, so it became sixteen two systems scale, has been used until the early liberation; In the 1950s, it was changed to twelve systems, that is, twelve for one jin and two jin for one kilogram. Because the steelyard is simple to make and convenient to carry, it is widely used. In the 1980s, the annual output of the steelyard reached tens of millions of units. However, the operation of steelyard is not convenient, slow measurement speed, poor accuracy is its fatal defects, with the increasing prosperity of the market, this defect has caused more and more harm to the development of the market and people's life, its negative impact has been far beyond the scope of lack of weight. According to the strong response from all walks of life, the State Bureau of Technical Supervision and the State Administration for Industry and Commerce in September 23, 1994 jointly issued the "notice on the public trade restrictions on the use of steelyard", the position of the steelyard gradually for their own display weighing apparatus (electronic scale, spring degree scale, etc.) replaced, this indicates that the use of thousands of years of steelyard will disappear from people's life stage;
Mechanical scale Mechanical scale refers to the general name of weighing instruments with mechanical structure as the fulcrum, including balance, desk scale, platform scale, spring scale, as well as large industrial and special weighing instruments.

(1) Balance: weighing fulcrum in the middle of all kinds of equal arm lever, balance and frame plate balance (also unequal frame plate balance), etc.

(2) Case scale: weighing in 50kg (excluding 50kg) below lever mechanical scale.
(3) Platform scale: lever type mechanical scale weighing 50 kg to 1000 kg.
(4) spring scale: the use of spring stretching balance for load, there are single-side display and double-side display.
(5) Large mechanical weighing apparatus and a variety of special weighing apparatus, including ground scale, ground scale, track scale (light rail and heavy rail), hopper scale, belt scale, packaging scale, hanging scale and steel scale, livestock scale, sugarcane scale, grain sales scale, liquid quantitative scale, weighing car, etc.; Only used in a single industry or a single process line of weight measuring instruments called special scale, such as postal scale, cigarette scale, etc.

Mechanical balance processing means is easy to master, manufacturing cost and sales price are low, use the range is very wide, so at present in our country commercial balance product market is still dominant position (according to output accounted for 90% above), in industrial balance also occupies a significant proportion.

Electronic scale The weight of items carried on the pedestal, tray and hook of the scale is balanced by the creep reaction of the sensor. The scale shown digitally by the instrument is the electronic scale.